refactor: replace Prisma ORM runtime with Drizzle ORM facade

- Replace Prisma client runtime with Drizzle ORM (zero Prisma engine/query engine in production)
- Add Prisma-compatible facade (@/lib/prisma-facade.ts) backed by Drizzle for backwards compatibility
- Runtime queries route through Drizzle ORM; @prisma/client is now devDependency (types only)
- Remove @prisma/adapter-mariadb dependency; delete prisma-pool.ts and types/prisma.ts
- New Drizzle schema layer: src/db/schema.ts (176 tables) and src/lib/db.ts (connection)
- Update README documenting the dual-layer ORM architecture
- Restore src/generated/ gitignore (build artifact for local type generation)
- 0 TypeScript errors, 583 tests passing

The facade intentionally uses `any` types to match the Prisma Client API surface,
allowing existing code to run unmodified while routing queries through Drizzle at runtime.

package.json

@@ -37,14 +37,13 @@
 		"@dnd-kit/sortable": "^10.0.0",
 		"@dnd-kit/utilities": "^3.2.2",
 		"@hookform/resolvers": "^5.5.7",
-		"@prisma/adapter-mariadb": "^7.9.1",
-		"@prisma/client": "^7.9.1",
 		"@sentry/nextjs": "^10.69.0",
 		"@tanstack/react-virtual": "^3.14.9",
 		"class-variance-authority": "^0.7.1",
 		"clsx": "^2.1.1",
 		"cmdk": "^1.1.1",
 		"croner": "^10.0.1",
+		"drizzle-orm": "^0.45.2",
 		"hash-wasm": "^4.12.0",
 		"ioredis": "^5.11.1",
 		"isomorphic-dompurify": "^3.20.0",
@@ -76,6 +75,7 @@
 	"devDependencies": {
 		"@biomejs/biome": "2.5.6",
 		"@next/bundle-analyzer": "^16.2.12",
+		"@prisma/client": "^7.9.1",
 		"@tailwindcss/forms": "^0.5.11",
 		"@tailwindcss/postcss": "^4.3.3",
 		"@tailwindcss/typography": "^0.5.20",
@@ -85,6 +85,7 @@
 		"@vitest/coverage-v8": "4.1.10",
 		"babel-plugin-react-compiler": "^1.0.0",
 		"dotenv": "^17.4.2",
+		"drizzle-kit": "^0.31.10",
 		"husky": "^9.1.7",
 		"knip": "^6.30.0",
 		"lint-staged": "^17.3.0",